[swift-evolution] Problems with generics - should be fixed for Xcode 9?
Félix Cloutier
felixcloutier at icloud.com
Sun Sep 17 16:58:59 CDT 2017
I always thought that this was a bug, but I can't find it on bugs.swift.org, so I'd love to know if it's meant to stay this way or not.
> Le 16 sept. 2017 à 06:32, Joanna Carter via swift-evolution <swift-evolution at swift.org> a écrit :
>
> Greetings
>
> Old chestnut, sort of partially solved but still problems.
>
> Now we can nest types in generic types, what I want is :
>
> class Event<typeT>
> {
> class Args
> {
> public static let empty = Args() // error : Static stored properties not supported in generic types
> }
> }
>
> But the static let is not directly in the generic class.
>
> So, I end up doing another convoluted workaround in the shape of :
>
> class Event<typeT>
> {
> class Args
> {
> public static var empty: Args
> {
> return Args()
> }
> }
> }
>
> The main difference is that I have to create a new instance on every call to Args.empty instead of returning the same one.
>
> Is this an oversight or as intended, with the hope of fixing it in a future version
>
> Joanna
>
> --
> Joanna Carter
> Carter Consulting
>
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